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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.21 D.h.w. circulating pump Q4 (ZuFu4)
•
D.h.w. is instantly available
The circulating pump prevents the d.h.w. from cooling down in the supply lines. This
means that hot water comes out of the tap more quickly.
Setting range
Unit
Factory setting
--- / 101...110
Q4
---
The auxiliary function is activated as soon as circulating pump Q4 is assigned to a free
terminal:
101...110
D.h.w. circulating pump
Q4
can be assigned to a free relay terminal
between Q101 and Q110.
---
No assignment made and the d.h.w. circulating pump is not activated.
When the auxiliary function is activated, the circulating pump operates according to the
setting made on operating line 772 (switching program “Circulating pump”).
In addition, it is possible to define if, during the legionella function, the d.h.w. circulating
pump shall be put into operation (see operating line 795), aimed at thermally disinfect
the d.h.w. supply lines.
The d.h.w. circulating pump can be integrated in the diagram as follows:
Example:
Q4
ZuFu 4
B3
B31
BwSp 3
Q3
23
93
Z0
4
Benefit
Description
Setting
Assignment
Effect
Application example